Results 101 to 110 of about 20,504 (258)

Oxetanes: Recent Advances in Synthesis, Reactivity and Medicinal Chemistry [PDF]

, 2016
The 4-membered oxetane ring has been increasingly exploited for its behaviors, i.e. influence on physicochemical properties as a stable motif in medicinal chemistry, and propensity to undergo ring opening reactions as a synthetic intermediate.
Bull, JA, Croft, RA, Davis, OA, Doran, R, Morgan, KF   +4 more
core   +1 more source

Contrasts among origins of corn hybrids in relation to their susceptibility to nicosulfuron and isoxaflutole herbicides
Contrastes entre procedências de híbridos de milho em relação à suscetibilidade aos herbicidas nicosulfuron e isoxaflutole

Semina: Ciências Agrárias, 2010
Herbicide selectivity is the basis for successfull weed chemical control in agricultural production, as it is considered as a measurement of the difeerential response of different plant species to a certain herbicide.
Rosecler Salete Canossa, João Guilherme Zanetti de Arantes, Diego Gonçalves Alonso, Denis Fernando Biffe, Jamil Constantin, Rubem Silvério de Oliveira Junior, Sidnei Douglas Cavalieri   +6 more
doaj   +1 more source

Xanthines as a scaffold for molecular diversity [PDF]

, 2018
Summary: Xanthines represent a new, versatile scaffold for combinatorial chemistry. A five-step solid-phase synthesis of xanthine derivatives is described which includes alkylations, a nucleophilic displacement reaction at a heterocycle and a ring ...
Eberle, Alex, Heizmann, Gerhard
core  

An anomalous hydration/dehydration sequence for the mild generation of a nitrile oxide [PDF]

, 2011
A nitrile oxide containing a carbamoyl group is readily generated upon the treatment of 2-methyl-4-nitro-3-isoxazolin-5(2H)-one with water under mild reaction conditions, even in the absence of special reagents.
884, 885, 886, 887, 888, 889, 890, 891, 892, 893, Ariga, Masahiro, Hirao, Shotaro, Kiyoto, Hideyuki, Kobiro, Kazuya, Maki, Asaka, Nishiwaki, Nagatoshi, Okajima, Yoshikazu, Saigo, Kazuhiko, Sawayama, Jun, Uehara, Toshiharu   +19 more
core   +2 more sources

Cycloaddition of Benzyne with Alkoxy-Substituted Pyrroline-N-oxides­: Unexpected Rearrangement to an N-Phenylpyrrole

SynOpen, 2018
Reaction of enantiopure 3,4-dialkoxy-pyrroline N-oxides with benzyne affords the expected tetrahydrobenzo[d]pyrrolo[1,2-b]isoxazoles along with an unexpected 2,3-disubstitued-N-phenyl-pyrrole derived from an unprecedented rearrangement of the adduct of ...
Franca M. Cordero, Bhushan B. Khairnar, Anna Ranzenigo, Alberto Brandi   +3 more
doaj   +1 more source

CXX.—Action of alkalis on the nitro-compounds of the paraffin series. Part II. Reactions and constitution of methazonic acid and the mode of formation of isoxazoles [PDF]

, 1900
Wyndham R. Dunstan, Ernest Goulding
openalex   +1 more source

Selective [5 + 1] and [5 + 2] Cycloaddition of Ynamides or Propargyl Esters with Benzo[ d]isoxazoles via Gold Catalysis.

Journal of Organic Chemistry, 2018
Benzo[ d]isoxazoles are found to act as novel nucleophiles to undergo gold-catalyzed [5 + 1] or [5 + 2] cycloaddition reactions with ynamides. The reaction provides a concise and chemoselective access to polysubstituted 2 H-benzo[ e][1,3]oxazines or ...
W. Xu, Jidong Zhao, Xiangdong Li, Yuanhong Liu   +3 more
semanticscholar   +1 more source

ASPECTS OF THE BIOGENIC AMINE‐DEPLETING ACTIVITY OF ETHYL 3‐ACETAMIDO‐4H‐PYRROLO‐[3,4‐c]ISOXAZOLE‐5(6H)‐CARBOXYLATE IN THE RAT [PDF]

, 1968
W. Lippmann, Marcia Wishnick
openalex   +1 more source

Stereoselective synthesis of α-amino-C-phosphinic acids and derivatives [PDF]

, 2016
α-Amino-C-phosphinic acids and derivatives are an important group of compounds of synthetic and medicinal interest and particular attention has been dedicated to their stereoselective synthesis in recent years. Among these, phosphinic pseudopeptides have
Cativiela, Carlos, Ordóñez, Mario, Sayago, Francisco J., Viveros-Ceballos, José Luis   +3 more
core   +3 more sources

Aplicação de α-oxoceteno ditiocetais em síntese orgânica Reactivity of α-oxoketene dithiocetals in organic synthesis

Química Nova, 2010
The synthesis and reactivity of α-oxoketenes dithioacetals (S,S-acetals), general structure [(R¹C=OC(R²)=C(SR³)(SR4)], are reported. We also showed the application of S,S acetals as synthons for efficient synthesis of isoxazoles, pyrazoles ...
Geonir M. Siqueira, Patrícia D. Neuenfeldt, Anaí Duarte, Lizandra C. Bretanha, Rogério A. Freitag, Wilson Cunico   +5 more
doaj   +1 more source